MAMA'S LITTLE BOY

At 24, Britney Spears is a mom twice over – and it's exactly how she wanted it. The pop princess who had yearned to be a young mother got her wish on Sept. 14, 2005, when she and husband Kevin Federline, then 27, welcomed Sean Preston (6 lbs 11 oz). And now? "He's about to start walking," she says.